Get Phone number typeId using following snippet
 (this is for Organization Phone nos)

 String type = Organization.class.getName() + ListTypeConstants.PHONE;
 List phoneTypes = ListTypeServiceUtil.getListTypes(type);
 System.out.println("phoneTypes : "+phoneTypes);

Avoid resubmit on actionURL

Make following entry in liferay-portlet.xml 

<action-url-redirect>true</action-url-redirect>
 By default its value is false.